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Author Topic:   this thing pushes so much I feel it it my sleep!!
klw45black
Dirt Full Roller

Total posts: 42
posted August 03, 2004 10:17 AM  
Last fall I bought a Mod that was as I'm told set up for long tracks and asphalt. This year (my first) I've fought a real bad push. Being new to the throw it in and hang it out there deal I have not always been sure it was me or the car. The car was too low too rigid. First change, car originally had a 4 bar on the right and a z link on the left. Now it's 4 bars on both. I have after each race made changes to get gid of this push. I raised the car 2inches all around which helped alot. I have my J bar on the bottem hole on the r-end and 5 deg to the chassis. My questions are would a short bar help roll this thing over more and help me get rid of this push? Should I Z-link the right or leave it as is? And what at the track adjustments could I try that would help.
springs are:
lf-900
rf-800
lr-200
rr-150
Thanks

JDTURNLEFT
Dirt Full Roller

Total posts: 36
posted August 03, 2004 11:17 AM  
what are your scale #'s, I am not an expert but I fought a push all last year but have a handle on it this year. I can relate to the feeling the push in your sleep.

klw45black
Dirt Full Roller

Total posts: 42
posted August 03, 2004 11:32 AM  
Scales Wts are @
Left-1432 @ 54.4%
Rear-1446 @ 55%
Cross-1361 @ 51.8%
155 lb on the left
Thanks

Iowamod20
Dirt Full Roller

Total posts: 73
posted August 03, 2004 11:56 AM  
Is this a push on entry or in the middle when you pick up the throttle?

Soften the front springs and/or stiffen the RR spring.

juliaferrell
Dirt Freak

Total posts: 370
posted August 03, 2004 12:26 PM  
too much front spring.........

JDTURNLEFT
Dirt Full Roller

Total posts: 36
posted August 03, 2004 12:54 PM  
I just looked at original message close, I probably am no help on the pavement advise.
Are you running dirt or pavement ?

klw45black
Dirt Full Roller

Total posts: 42
posted August 03, 2004 12:56 PM  
Push is after you've set the car and just start to get back on the throttle. So deeper into the entry. How far should I back off the front???50 100lbs? What about the back RR I'm just lookin' for a starting range.
Thanks

dogwalker
Dirt Full Roller

Total posts: 65
posted August 03, 2004 12:59 PM  
....may be right, could be too much front spring, but i would try swapping the front so the heavier is on the right first.

Iowamod20 has a good point, some of this depends on where the push occurs. If it's when you pick up the throttle, it could be bar angles adding dynamic cross as the car gets on the left rear bars ect.

You could also take 1% of cross out and see if it helps....last sat. night, I took one turn out of mine (RF course thread) and it loosened the car up enough to turn good.

klw45black
Dirt Full Roller

Total posts: 42
posted August 03, 2004 01:45 PM  
Sorry my fault, Runnin' on dirt. On dry slick the car is easy to drive if I keep the thing under me and be smooth on the fun pedal. when track conditions are just before the dry slick is where the push shows up the most. So if I'm hearing you right maybe take some bar angle out to drop some cross wt? And or take some out of the rf?
Thanks

JDTURNLEFT
Dirt Full Roller

Total posts: 36
posted August 03, 2004 03:10 PM  
that sounds just like my car right now except mine rolls over pretty good. I had to learn not to drive it sideways, my car has good foward bite and most of the tracks go dry slick anyway. It is a fast combination, can run where there is no traffic but I am having trouble controlling the nut behind the wheel. Did you check for binds ? I also switched to a rear panhard for this year. the j-bar made my car too tight. I have been adding stagger for the heat but still have a bit of a push. I have been suffering thru the heat but usually just right for the main.

klw45black
Dirt Full Roller

Total posts: 42
posted August 03, 2004 04:08 PM  
That seems to be my problem also, struggle through the heat and for the main it's alot closer. But I think part of the pavement car comes in when it's dry slick, i don't know, but it does seem to like to stay in tight. I've been wrestling with this and learnin' how to drive the thing & with the constantly changing set ups I'm sure glad I like this stuff. Old drag racer turnin' left, but oh what a blast. If you try to drive it sideways what are the negatives? Just trying to learn asap!!

JDTURNLEFT
Dirt Full Roller

Total posts: 36
posted August 03, 2004 05:09 PM  
mine if you force a slide it is unpredictable, some times it will bite up and cut to the infield, next time it will push and sometimes be ok. My car was setup to run both front j-bar or rear pan. At our test and tune this year I started with the j-bar like last year (and the way the guy I bought it from ran it) and had the same results, fighting a push. We changed to the rear panhard and it was like a light switch turned on, it seemed to free the car at the middle. we also changed some rear arm lengths of the z-link. My car is z-link both sides

Ego Racing
Dirt Forum Champ
Total posts: 724
posted August 03, 2004 08:07 PM  
Asphalt cars run the J-bar monted on the right on the chassis, If yours is like this switch the chassis mount to the left side and to the pinion on the right side of the yoke. Leave the right side mounts in because as you have noticed it is good for a low momentun corner track. Dry slick or black tacky where you drive like asphalt.

joeltjen
Dirt Maniac

Total posts: 182
posted August 03, 2004 10:22 PM  
if it was a tar car your front roll center might be too far to the right. we had a similar problem last year and we found our front roll center was way over to the right. if you get too far to the left it will get up on the right front going in and want to spin out (guess who went too far to the left first part of this year.....????) my .02, john

fastow
Dirt Maniac

Total posts: 168
posted August 03, 2004 10:56 PM  
put the pillow at the other end of the bed then maybe it would be loose LOL

klw45black
Dirt Full Roller

Total posts: 42
posted August 04, 2004 09:50 AM  
Fastow.. you must a been there done that!!! Thanks for the wisdom! That does seem to be the way to discribe this car right now unpredictable, sometimes you'll go in hot and sideways and she'll let you put your foot down & go, next time she'send you to the marble patch. I'm taking a look at the whole panhard vs shorty bar right now. The J bar is on the left right now Ego Racing but as you say I got my dry slick set figured out for now thanks. Engine is set to the right but could be moved to th left 1.5" if needed. Swapped springs in the front trying to get ready for Sat.nite. also takin' some gear out of the rear.
Thanks!

paulickr
Dirt Maniac

Total posts: 110
posted August 04, 2004 12:09 PM  
had the similar problem, went to a short bar 1" below pinion and 3-1/2" of rake to the feft side of the chassis then put 1/2" of lead in the left rear tire. holy cow man hang on cause your going for a ride, finally a car that handles. switch those front springs so heavy one is on rf too.

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